@Pypro    Just to add to what @gtorres asked you to try.  Make sure that you are performing the action from the NiFi host as the NiFi service user.  All components execute as the NiFi service user.  And in this case the NiFi service user is trying to connect to the FTP endpoint and then pass the supplied credentials.  The target FTP server may not be in the NiFi service users known_hosts file. Did you also try using the ListSFTP processor? Thanks, Matt ... View more